On Christmas Eve, 1975, skilled pilot Peter Gibbs started a plane for a flight. He was advised not to take off, as it was pitch black over the Scottish airstrip, there were no guiding lights, and a winter storm was approaching fast. Not deterred, Peter took off anyway to prove such a takeoff and landing could be made - but he never made it back. Four months later, his body was found, in plain view on top of a hill that had already been searched. More questions were raised and speculation abounds in what is now known as the Great Mull Air Mystery.